Hybrid welding methods for advanced materials

先进材料的混合焊接方法

• 批准号: RGPIN-2019-05636
• 负责人: Gerlich, Adrian
• 金额: $ 3.35万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=689292
• 关键词: Hybrid; welding; methods; advanced; materials

The latest advances in laser welding technology have brought new capabilities to control the delivery of heat and filler material to the pieces being joined. New technologies such as high frequency scanning, and combining laser with arc welding torches in hybrid-laser welding have enabled more flexibility in joining a broader range of materials. The total power and energy density of modern fiber lasers also enables high joining speeds to be achieved without excessive heating the surrounding materials, and this is vital to successful joining of modern high strength materials, and dissimilar combinations of metals. *** This proposal will develop processing conditions and filler materials using a state-of-the-art hybrid-laser welding system that has been custom designed to combine the latest technologies. The system is unique in North America and incorporates an 8kW fiber laser coupled with an arc welding torch and two supplementary wire feeders which enable a vast range of weld metal chemistries to be deposited during welding. The shape of the molten weld pool will be controlled by high frequency scanning optics which can focus a 0.2 mm spot size to the location where heat is required. This level of control will provide a flexibility to join new material combinations such as aluminum to steel for light weight vehicles, and zirconium to steel for power generation equipment. Also, new ultra-high strength alloys will be developed by continuously adjusting the rate of multiple different metal wires fed into the weld pool, and evaluating the deposited material properties along the length of the one joint with varying chemistry. This will realize a rapid prototyping of materials' concept, which can be used to quickly develop new filler metals for joining applications in the future.*** The research will also generate a new understanding of how to effectively apply hybrid-laser welding parameters to join the most difficult combinations of materials. The properties of the joints and weld metals will be tested using the most sophisticated mapping techniques that can determine the yield stress and hardness of material at microscopic scales, providing detailed information for specifications that can be used for design in industry. The students involved will not only become experts in applying new manufacturing processes, but also gain leading-edge skills in new testing methods and characterization using electron microscopy, allowing them to later advance the practices in industry when they graduate.**

激光焊接技术的最新进展为将热量和填充材料的输送提供了新的功能，以加入所加入的材料。在混合激光器焊接中，将激光与弧形焊接相结合的新技术，使其在加入更广泛的材料方面具有更大的灵活性。现代纤维激光器的总功率和能量密度也可以使高高的连接速度在不加热周围材料的情况下实现，这对于成功连接现代高强度材料和金属的不同组合至关重要。 ***该提案将使用最新的混合激光焊接系统来开发加工条件和填充材料，该焊接系统旨在结合最新技术。该系统在北美是独一无二的，并结合了8kW纤维激光器，再加上电弧焊接火炬和两个补充电线馈线，使焊接过程中可以沉积大量的焊接金属化学物质。熔融焊池的形状将由高频扫描光学元件控制，该光学元件可以将0.2 mm的斑点大小集中到需要热量的位置。这种控制水平将提供灵活性，以将新的材料组合（例如铝与轻型车辆的钢）以及锆石到发电设备的钢材。此外，通过连续调整送入焊接池的多个不同金属电线的速率，并评估沿着一个接头的长度不同的化学性质，将开发新的超高强度合金。这将实现对材料概念的快速原型，该概念可用于快速开发新的填充金属以将来加入应用程序。将使用最复杂的映射技术对接缝和焊接金属的特性进行测试，这些技术可以确定微观尺度上材料的屈服应力和硬度，从而为可用于行业设计的规格提供详细信息。参与的学生不仅将成为应用新制造流程的专家，而且还将在使用电子显微镜的新测试方法和表征方面获得领先的技能，从而使他们能够在毕业时稍后推进行业实践。** **